<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="./vue.js"></script>
    <script src="./velocity.js"></script>
</head>

<body>
    <div id="app">
        <input placeholder="请输入要查找的内容" type="text" v-model="query">
        <transition-group name="item" tag="ul" @before-enter="beforEnter" @enter="enter" @leave="leave"
            v-bind:css="false">
            <li v-for="(item,index) in ComputedList" :key="item.msg" :data-index="index">
                {{ item.msg }}
            </li>
        </transition-group>
    </div>
    <script type="text/javascript">
        var vm = new Vue({
            el: '#app',
            data() {
                return {
                    query: '',
                    item: [
                        { msg: '张三' },
                        { msg: '李四' },
                        { msg: '王芳芳' },
                        { msg: '王琳琳' },
                        { msg: '胡宇轩' }
                    ]
                }
            },
            computed:{
                ComputedList (){
                    var vm = this.query
                    var nameList = this.item
                    return nameList.filter(function (item){
                        return item.msg.toLowerCase().indexOf(vm.toLowerCase()) !==-1
                    })
                }
            },
            methods:{
                beforEnter (el) {
                    el.style.opacity = 0
                    el.style.height = 0
                },
                enter (el,done) {
                    var delay = el.dataset.index * 150
                    setTimeout(function (){
                        Velocity(el, {opacity:0, height: '1.6em'},{complete: done})
                    },delay)
                },
                leave (el, done){
                    var delay = el.dataset.index * 150
                    setTimeout(function(){
                        Velocity(el, {opacity: 0, height: 0},{complete: done})
                    },delay)
                }
            }
        })
    </script>
</body>

</html>